Marconi TF1247 Q-meter with the matching 20-300 MHz Oscillator
The Q-meter itself is operational to 50 kHz
This is foremost a Q-meter, or as the Englishmen say: Circuit Magnification Meter.
This is the right side instrument and the oscillator for it is on the left.
The oscillator seldom comes with the instrument so this is a nice and somewhat unusual set.
The Q-meter is superb, it is one of the best, and it has a variable capacitor to kill for!
This oscillator came to us from a retiring electrical engineer who used this in his calibration and product development electronics lab.